Rifle and bullet



Feb. 21, 1928.

. A. A. COWAN RIFLE AND BULLET Filed Feb. 26. 1926 2 Sheets-Sheet lATNMEY Feb. 21, 1928.

A. A. COWAN RIFLE AND BULLET Filed Feb. 25, 1926 2 Sheets-Shee.. 2

INVENTOR Patented Feb. 21, 1928.

PATE. T QFFIC ALBERT A. COWAN, 0F VICTOR, MONTANA.

RIFL AND BULLET.

Application filed February 26, 1926. Serial No. 90,911.

The object of this invention is to provide a rifle and bullet soconstructed that friction shall be reduced, and the effectiveness of theweapon when a given quantity of powder is employed shall be greatlyincreased.

A further object is to provide a bullet and shell for use with a barreland breech formed to correspond with the new construction, the shellbeing angular in cross section and the bullet being rilied and connectedwith the shell in a particular manner, the rifling of the barrel beingcut away as described.

With the foregoing and other objects in view, the invention consists inthe novel construction and arrangement of elements to be described,illustrated and claimed, it being understood that modifications may bemade within the scope of the claim without departing from the spirit ofthe invention.

In the drawing forming part of this application,

Figure 1 shows the rifle in side elevation, portions being broken awayand other portions being in longitudinal section.

Figure 2 shows a shell in position and in end elevation.

Figure 3 shows a portion of the barrel in longitudinal section.

Figure 4 is a section on line of Figure 3, showing the riing of thebarrel.

Figure 5 is an enlarged view of the shell and bullet, the view beingchieiiy in elevation.

Figure 6 is an end view of the cartridge.

Figure 7 is a section through the bullet, the section being on line 7-7of Figure 5.

Figure 8 is a section on line 8-8 of Figure 5.

Figure 9 is a section on line 9-9 of Fig ure 5.

The rifle may be of standard construction except as regards the featurehereinafter described and showing departure from usual form andconstruction. The stock of the gun is designated 10, and the barrel 11has threaded connection at 12 with the internally threaded portion 13 ofthe breech chamber. The barrel is provided with a square, or other formof angular bore 14, the walls of which are straight, these walls merginginto tapered walls l5. The rifles 16 of the barrel are cut away at 17 toform portions permitting the rifles of the bullet to be described belowto enter the rifles ofthe barrel. The .rifles of the barrel willtherefore have an edge portion on the non-friction side thereof which isparallel with the main axis of the barrel, the friction side of therifle being in spiral forni. The shell is designated generally by theletter S and includes the square or other angular portion 20,corresponding with the angular portion 14 of the bore, said portion 2Ohaving at one end thereof an extracting rim or iiange 21 serving theusual purpose.

The shell is tapered at 22, the taper extending to the point shown, andthe extreme end being crimped at 23 for engagement with the bullet. Theforward band 24 of the bullet is in contact with the crimped portion 23,and is of soft metal. The rear band 25 is also of soft metal. Therifling of the bullet referred to below, is interrupted by the bands 24and 25.

The bullet B includes a forward tapered portion 28, the taper assistingin bringing the bullet to place in the barrel, and with reference to therifles thereof. The rifled portion of the bullet is designated 30, ithaving already been noted that the rifles are interrupted by band 24,this band tending to prevent the escape of gases.

The shell is designed to place the bullet properly in the barrel, andthe bullet is designed toenter the rifling and pass through the barrelwith as little friction as practicable, thereby increasing theefficiency of the powder charge and increasing the speed of the missile.It is also possible to carry out the principle involved by making use ofa round shell, the form here described being preferred.

What is claimed is In a fire-arm, a breech chamber, square in crosssection, and a riled barrei, the nonfi'iction edge of the rifles beingcut away near the breech to form walls substantially parallel with themain axis of the barrel, and a chamber tapering toward a reduced forwardportion.

In testimony whereof I affix my signature.

ALBERT A. COWAN.

